Beaverhead County, the City of Dillon, and the Town of Lima are working with the Federal Emergency Management Agency (FEMA) and Montana Department of Natural Resources and Conservation (DNRC) to update floodplain maps for the Beaverhead River, Blacktail Deer Creek, Selway Slough, Junction Creek in Lima and other flow splits from the Beaverhead River and Blacktail Creek. Updated floodplain maps will depict the latest, most accurate flood risk data, and will eventually replace FEMA’s existing floodplain maps which are based on data from the 1980s.

New Flood Insurance Rate Maps from this project are not expected to be finalized for a while – the study information and maps need to go through a technical and public review process 

When finalized, the new maps could have effects on some property owners in mapped floodplains (see Floodplain FAQs page for more information).

View Draft Floodplain Maps

You can view individual draft maps and reports here: Maps & Technical Reports

Get more information on floodplain designations referenced on the maps:

• 100-Year Floodplain
• Floodway Area (within a 100-Year Floodplain)
• 500-Year Floodplain

Newly Mapped into a 100-Year Floodplain on the draft maps? See Low Cost Insurance Options

Attend a Public Open House Meeting

Public Open Houses are tentatively scheduled for April 2019.  Check back soon for more information.

Give comments during the official Appeal and Comment Period

During this project you will have the opportunity to submit an official comment or appeal about the proposed floodplain changes to FEMA. Check back here in order to stay informed on the specific dates of the appeal and comment Period (estimated early 2020).

Come back for more information

We will update this website with new, relevant information as this project progresses.

Know your property's flood risk

Flood Insurance Rate Maps indicate areas of flood risk. Once this project is complete, updated Flood Insurance Rate Maps will provide more accurate, current, and detailed data and mapping of flood risk areas.